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        var data = [{
            name: '海门',
            value: 9
        }, {
            name: '鄂尔多斯',
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        }, {
            name: '招远',
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            name: '舟山',
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            name: '齐齐哈尔',
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            name: '盐城',
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        }, {
            name: '赤峰',
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            name: '青岛',
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            name: '乳山',
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            name: '金昌',
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            name: '泉州',
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            name: '莱西',
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            name: '日照',
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            name: '胶南',
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            name: '拉萨',
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            name: '文登',
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            name: '威海',
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            name: '厦门',
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            name: '汕尾',
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            name: '潮州',
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            name: '丹东',
            value: 27
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            name: '曲靖',
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            name: '烟台',
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            name: '福州',
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            name: '连云港',
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            name: '葫芦岛',
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            name: '嘉峪关',
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            name: '焦作',
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            name: '乌鲁木齐',
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            name: '邢台',
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            name: '德州',
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            name: '济宁',
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            name: '荆州',
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            name: '武汉',
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            '莱芜': [117.67, 36.19],
            '常德': [111.69, 29.05],
            '保定': [115.48, 38.85],
            '湘潭': [112.91, 27.87],
            '金华': [119.64, 29.12],
            '岳阳': [113.09, 29.37],
            '长沙': [113, 28.21],
            '衢州': [118.88, 28.97],
            '廊坊': [116.7, 39.53],
            '菏泽': [115.480656, 35.23375],
            '合肥': [117.27, 31.86],
            '武汉': [114.31, 30.52],
            '大庆': [125.03, 46.58]
        };

        var convertData = function(data) {
            var res = [];
            for (var i = 0; i < data.length; i++) {
                var geoCoord = geoCoordMap[data[i].name];
                if (geoCoord) {
                    res.push({
                        name: data[i].name,
                        value: geoCoord.concat(data[i].value)
                    });
                }
            }
            return res;
        };

        function renderItem(params, api) {
            var coords = [
                [116.7, 39.53],
                [103.73, 36.03],
                [112.91, 27.87],
                [120.65, 28.01],
                [119.57, 39.95]
            ];
            var points = [];
            for (var i = 0; i < coords.length; i++) {
                points.push(api.coord(coords[i]));
            }
            var color = api.visual('color');

            return {
                type: 'polygon',
                shape: {
                    points: echarts.graphic.clipPointsByRect(points, {
                        x: params.coordSys.x,
                        y: params.coordSys.y,
                        width: params.coordSys.width,
                        height: params.coordSys.height
                    })
                },
                style: api.style({
                    fill: color,
                    stroke: echarts.color.lift(color)
                })
            };
        }

        option = {
            backgroundColor: 'transparent',
            title: {
                text: '全国主要城市空气质量',
                subtext: 'data from PM25.in',
                sublink: 'http://www.pm25.in',
                left: 'center',
                textStyle: {
                    color: '#fff'
                }
            },
            tooltip: {
                trigger: 'item'
            },
            bmap: {
                center: [104.114129, 37.550339],
                zoom: 5,
                roam: true,
                mapStyle: {
                    styleJson: [{
                        "featureType": "water",
                        "elementType": "all",
                        "stylers": {
                            "color": "#044161"
                        }
                    }, {
                        "featureType": "land",
                        "elementType": "all",
                        "stylers": {
                            "color": "#004981"
                        }
                    }, {
                        "featureType": "boundary",
                        "elementType": "geometry",
                        "stylers": {
                            "color": "#064f85"
                        }
                    }, {
                        "featureType": "railway",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "highway",
                        "elementType": "geometry",
                        "stylers": {
                            "color": "#004981"
                        }
                    }, {
                        "featureType": "highway",
                        "elementType": "geometry.fill",
                        "stylers": {
                            "color": "#005b96",
                            "lightness": 1
                        }
                    }, {
                        "featureType": "highway",
                        "elementType": "labels",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "arterial",
                        "elementType": "geometry",
                        "stylers": {
                            "color": "#004981"
                        }
                    }, {
                        "featureType": "arterial",
                        "elementType": "geometry.fill",
                        "stylers": {
                            "color": "#00508b"
                        }
                    }, {
                        "featureType": "poi",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "green",
                        "elementType": "all",
                        "stylers": {
                            "color": "#056197",
                            "visibility": "true"
                        }
                    }, {
                        "featureType": "subway",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "true"
                        }
                    }, {
                        "featureType": "manmade",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "local",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "arterial",
                        "elementType": "labels",
                        "stylers": {
                            "visibility": "off"
                        }
                    }, {
                        "featureType": "boundary",
                        "elementType": "geometry.fill",
                        "stylers": {
                            "color": "#029fd4"
                        }
                    }, {
                        "featureType": "building",
                        "elementType": "all",
                        "stylers": {
                            "color": "#1a5787"
                        }
                    }, {
                        "featureType": "label",
                        "elementType": "all",
                        "stylers": {
                            "visibility": "true"
                        }
                    }]
                }
            },
            series: [{
                name: 'pm2.5',
                type: 'scatter',
                coordinateSystem: 'bmap',
                data: convertData(data),
                encode: {
                    value: 2
                },
                symbolSize: function(val) {
                    return val[2] / 10;
                },
                label: {
                    formatter: '{b}',
                    position: 'right'
                },
                itemStyle: {
                    color: '#ddb926'
                },
                emphasis: {
                    label: {
                        show: true
                    }
                }
            }, {
                name: 'Top 5',
                type: 'effectScatter',
                coordinateSystem: 'bmap',
                data: convertData(data.sort(function(a, b) {
                    return b.value - a.value;
                }).slice(0, 6)),
                encode: {
                    value: 2
                },
                symbolSize: function(val) {
                    return val[2] / 10;
                },
                showEffectOn: 'emphasis',
                rippleEffect: {
                    brushType: 'stroke'
                },
                hoverAnimation: true,
                label: {
                    formatter: '{b}',
                    position: 'right',
                    show: true
                },
                itemStyle: {
                    color: '#f4e925',
                    shadowBlur: 10,
                    shadowColor: '#333'
                },
                zlevel: 1
            }, {
                type: 'custom',
                coordinateSystem: 'bmap',
                renderItem: renderItem,
                itemStyle: {
                    opacity: 0.5
                },
                animation: false,
                silent: true,
                data: [0],
                z: -10
            }]
        };
        if (option && typeof option === 'object') {
            myChart.setOption(option);
        }
    </script>
</body>

</html>